CN110958669A - Intelligent terminal and power control method thereof - Google Patents

Intelligent terminal and power control method thereof Download PDF

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Publication number
CN110958669A
CN110958669A CN201811133391.9A CN201811133391A CN110958669A CN 110958669 A CN110958669 A CN 110958669A CN 201811133391 A CN201811133391 A CN 201811133391A CN 110958669 A CN110958669 A CN 110958669A
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voltage
intelligent terminal
battery
current
preset reference
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CN201811133391.9A
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CN110958669B (en
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张刚建
张静磊
黄广彬
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Hytera Communications Corp Ltd
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Hytera Communications Corp Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0251—Power saving arrangements in terminal devices using monitoring of local events, e.g. events related to user activity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/52—TPC using AGC [Automatic Gain Control] circuits or amplifiers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Telephone Function (AREA)

Abstract

The application discloses an intelligent terminal and a power control method thereof, wherein the power control method comprises the following steps: acquiring the current voltage of a battery of the intelligent terminal according to a preset frequency; acquiring DAC output voltage according to the current voltage of the battery of the intelligent terminal and a preset reference voltage; and compensating the output power of the intelligent terminal according to the DAC output voltage and the consumption voltage of the intelligent terminal. According to the power control method of the intelligent terminal, power output can be selectively performed according to the change of the electric quantity of the battery, the standby time is prolonged, and the user experience is improved.

Description

Intelligent terminal and power control method thereof
Technical Field
The present invention relates to the field of wireless mobile communications, and in particular, to an intelligent terminal and a power control method thereof.
Background
In recent years, the field of radio communication has been rapidly developed, and communication terminals of various systems have been widely used by the public. At present, how to increase the standby time of a communication terminal is a relatively important subject in the industry, and is more important in the wide-band and narrow-band integration, who has longer standby time can better have advantages in commercial competition. Currently, for prolonging the standby time of a communication terminal, it is common to periodically detect the signal strength of a channel, and enter a normal operating state when the signal strength of the channel exceeds a threshold, or enter a sleep state otherwise. However, how to extend the standby time in the normal operating state has not been solved.
Therefore, it is necessary to provide a power control method for an intelligent terminal to solve the above technical problems.
Disclosure of Invention
The technical problem mainly solved by the application is to provide a power control method of an intelligent terminal, which can prolong the standby time in the working state of the intelligent terminal and improve the user experience.
In order to solve the above technical problem, a first aspect of the present application provides a power control method for an intelligent terminal, where the power control method includes: acquiring the current voltage of a battery of the intelligent terminal according to a preset frequency; acquiring DAC output voltage according to the current voltage of a battery of the intelligent terminal and a preset reference voltage; and compensating the output power of the intelligent terminal according to the DAC output voltage and the consumption voltage of the intelligent terminal.
With reference to the first aspect, in a first possible implementation manner of the first aspect, the step of obtaining the DAC output voltage according to the current voltage and the preset reference voltage specifically includes: judging whether the current voltage of the battery exceeds a preset reference voltage or not; if the current voltage of the battery exceeds a preset reference voltage, adjusting the output voltage of the DAC; and if the current voltage of the battery does not exceed the preset reference voltage, keeping the preset reference voltage as the DAC output voltage.
With reference to the first aspect, in a second possible implementation manner of the first aspect, the step of obtaining the current voltage of the battery of the intelligent terminal according to the preset frequency specifically includes: acquiring the residual electric quantity of a battery of the intelligent terminal; the remaining amount of power is converted into the current voltage of the battery.
With reference to the first possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, if the current voltage of the battery does not exceed the preset reference voltage, the step of adjusting the DAC output voltage specifically includes: outputting the current voltage of the battery to a Digital Signal Processor (DSP); the DAC output voltage is adjusted by the digital signal processor DSP.
With reference to the first possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, if the current voltage of the battery does not exceed the preset reference voltage, the step of adjusting the DAC output voltage specifically includes: acquiring the current frequency of the intelligent terminal; obtaining a corresponding reference value in a preset lookup table according to the current frequency of the intelligent terminal; calculating a compensation value of the current voltage of the battery relative to a preset reference voltage, wherein the compensation value is the product of the difference value of the current voltage of the battery and the preset reference voltage and a reference value; and acquiring DAC output voltage which is the difference value between the DAC value corresponding to the preset reference voltage and the compensation value.
With reference to the third possible implementation manner of the first aspect, in a fifth possible implementation manner of the first aspect, the intelligent terminal includes a radio frequency power amplifier, and the step of compensating the output power of the intelligent terminal according to the DAC output voltage and the consumption voltage of the intelligent terminal specifically includes: acquiring the consumption voltage of a radio frequency power amplifier; carrying out error amplification on the DAC output voltage and the consumption voltage of the radio frequency power amplifier in a subtraction circuit to obtain an error voltage; and controlling the grid bias voltage of the radio frequency power amplifier through the error voltage so as to control the power of the intelligent terminal.
With reference to the fifth possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, the step of obtaining the consumption voltage of the radio frequency power amplifier specifically includes: sampling the current consumed by the radio frequency power amplifier through a sampling resistor according to a preset frequency; the current consumed by the radio frequency power amplifier is converted into the consumed voltage of the radio frequency power amplifier through a current-voltage conversion circuit.
With reference to the first aspect, in a seventh possible implementation manner of the first aspect, the preset reference voltage is a rated battery voltage of the smart terminal.
With reference to the first aspect, in an eighth possible implementation manner of the first aspect, the preset reference voltage is any one of 7.4V, 7.6V, or 3.7V.
In order to solve the above technical problem, a second aspect of the present application provides an intelligent terminal, where the intelligent terminal includes a data acquisition circuit, a data processing circuit, and a power control circuit, which are sequentially connected by a circuit; the data acquisition circuit is specifically used for acquiring the current voltage of a battery of the intelligent terminal according to a preset frequency; the data processing circuit is specifically used for acquiring the DAC output voltage according to the current voltage of the battery of the intelligent terminal and a preset reference voltage; the power control circuit is specifically used for compensating the output power of the intelligent terminal according to the DAC output voltage and the consumption voltage of the intelligent terminal; the acquisition circuit, the data processing circuit and the power control circuit are mutually matched to realize any one of the power control methods.
The beneficial effect of this application is: different from the prior art, the method and the device dynamically control the output power, prolong the standby time and improve the user experience.
Drawings
Fig. 1 is a schematic flowchart of an embodiment of a power control method of an intelligent terminal according to the present application;
FIG. 2 is a flow diagram of one embodiment of a power control method of the smart terminal of FIG. 1;
FIG. 3 is a circuit diagram of one embodiment of a power control method of the smart terminal of FIG. 1;
fig. 4 is a schematic structural diagram of an embodiment of an intelligent terminal according to the present application.
Detailed Description
In order to make the technical problems solved, the technical solutions adopted, and the technical effects achieved by the present application clearer, the technical solutions in the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a schematic flowchart illustrating a power control method of an intelligent terminal according to an embodiment of the present application.
The power control method of the intelligent terminal of the embodiment comprises the following steps:
step 11: and acquiring the current voltage of the battery of the intelligent terminal according to the preset frequency.
In this embodiment, the intelligent terminal is an intercom, and may be another wireless communication terminal in other scenarios, which is not limited herein. The method comprises the steps of collecting the residual electric quantity of a battery of the intelligent terminal, and converting the residual electric quantity of the battery into the current voltage of the battery.
Step 12: and acquiring the output voltage of the DAC according to the current voltage of the battery of the intelligent terminal and a preset reference voltage.
A DAC (Digital to analog converter) is a device that converts a Digital signal into an analog signal (in the form of current, voltage, or charge).
In this embodiment, first, it is determined whether the current voltage of the battery exceeds a preset reference voltage; and if the current voltage of the battery exceeds the preset reference voltage, adjusting the output voltage of the DAC. And if the current voltage of the battery does not exceed the preset reference voltage, keeping the preset reference voltage as the DAC output voltage. The preset reference voltage is a rated battery voltage of the intelligent terminal, the preset reference voltage is 7.4V, and in other embodiments, the preset reference voltage may also be 7.6V or other values, which is not limited in the present application.
In another embodiment, the smart terminal is a mobile phone, and the preset reference voltage of the smart terminal is a rated voltage of a battery of the smart terminal. Specifically, the preset reference voltage of the intelligent terminal is 3.7V. In other embodiments, the preset reference voltage of the intelligent terminal may be determined according to the type of the intelligent terminal and the type of the battery of the intelligent terminal, which is not limited in this application.
In this embodiment, the current voltage of the battery is output to the digital signal processor DSP, and the DAC output voltage is adjusted by the digital signal processor DSP.
In the embodiment, the current frequency of the intelligent terminal is obtained; obtaining a corresponding reference value in a preset lookup table according to the current frequency of the intelligent terminal; calculating a compensation value of the current voltage of the battery relative to a preset reference voltage, wherein the compensation value is the product of the difference value of the current voltage and the preset reference voltage and a reference value; and acquiring DAC output voltage which is the difference value between the DAC value corresponding to the preset reference voltage and the compensation value.
Step 13: and acquiring the output voltage of the DAC according to the current voltage of the battery of the intelligent terminal and a preset reference voltage.
In the embodiment, the intelligent terminal comprises a radio frequency power amplifier, and the intelligent terminal acquires the consumption voltage of the radio frequency power amplifier; carrying out error amplification on the DAC output voltage and the consumption voltage of the radio frequency power amplifier in a subtraction circuit to obtain an error voltage; and controlling the grid bias voltage of the radio frequency power amplifier through the error voltage so as to control the power of the intelligent terminal.
Further, sampling the current consumed by the radio frequency power amplifier through a sampling resistor according to a preset frequency; the current consumed by the radio frequency power amplifier is converted into the consumed voltage of the radio frequency power amplifier through a current-voltage conversion circuit.
To specifically describe the power control method of the smart terminal of the present application, referring to fig. 2 and fig. 3, fig. 2 is a schematic flowchart of an embodiment of the power control method of the smart terminal of fig. 1, and fig. 3 is a schematic circuit structure diagram of an embodiment of the power control method of the smart terminal of fig. 1.
In this embodiment, the intelligent terminal is an intercom, and may be another wireless communication terminal in other scenarios, which is not limited herein. The following description will be made by taking an intercom as an example. With reference to fig. 2 and fig. 3, the power control method of the smart terminal of the present embodiment includes the following steps:
step 21: and acquiring the current voltage of the battery of the intelligent terminal according to the preset frequency.
The battery capacity of the interphone is always in the consumption process, and in order to dynamically control the output power of the interphone, the battery capacity is sampled according to the preset frequency. In a specific implementation scenario, the present application obtains the current voltage of the battery of the intelligent terminal according to a preset frequency. Specifically, the residual electric quantity of a battery of the interphone is collected according to a preset frequency, and the residual electric quantity is converted into the current voltage by a processor on the battery.
Step 22: and judging whether the current voltage exceeds a preset reference voltage or not, and determining the output voltage of the DAC.
In the intercom operating state, the larger the current voltage, the larger its output power. The method comprises the steps of providing a preset reference voltage value, compensating the output power of the interphone according to the relation between the current voltage and the preset reference voltage, namely obtaining the output voltage of the DAC according to the current voltage of the battery of the intelligent terminal and the preset reference voltage.
In this embodiment, the interphone transmits the current voltage converted from the processor to the CPLD201 through the data line for processing, so as to determine whether the current voltage of the battery exceeds the preset reference voltage. There are two operations according to the judgment result:
(1) the current battery voltage > the preset reference voltage, the DAC output voltage needs to be adjusted.
(2) And keeping the preset reference voltage as the DAC output voltage when the current battery voltage is less than or equal to the preset reference voltage.
The preset reference voltage is the rated voltage of the battery of the intelligent terminal, and the preset reference voltage is 7.4V. In other embodiments, the preset reference voltage may also be 7.6V, which is not limited herein.
In another embodiment, the smart terminal is a mobile phone, and the preset reference voltage of the smart terminal is a rated voltage of a battery of the smart terminal. Specifically, the preset reference voltage of the intelligent terminal is 3.7V. In other embodiments, the preset reference voltage of the intelligent terminal may be determined according to the type of the intelligent terminal and the type of the battery of the intelligent terminal, which is not limited in this application.
When the current voltage is greater than the preset reference voltage, the processed current voltage of the battery is output to the digital signal processor DSP202 for processing, and the data line may conform to a one wire (single bus) protocol. The single bus technology adopts a single signal line, namely, the clock and the data are transmitted, and the data transmission is bidirectional, so that the bus has incomparable advantages in the aspects of simple circuit, low hardware overhead, low cost and simple software design.
In order to compensate the output power more accurately, in the stage of processing the voltage data by the DSP202, the intelligent terminal of the embodiment first needs to acquire the current frequency. Under the same voltage, different working frequencies also influence the output power of the interphone. For example, in a high-frequency operating state, the output power of the interphone is high, and the consumption of the battery is larger.
And then, acquiring a corresponding reference value in a preset lookup table according to the current frequency of the interphone. In one specific implementation scenario, the reference value is the difference between the digital-to-analog value (DAC value) for a 7.4V high power and the digital-to-analog value (DAC value) for an 8.4V high power. For example, if the digital-to-analog value (DAC value) for 7.4V 4W is 1800 and the digital-to-analog value (DAC value) for 8.4V4W is 1700, the reference value is the difference between them, which is 100.
Correspondingly, the preset lookup table is a reference value set corresponding to different frequencies. Specifically, a digital-to-analog value (DAC value) corresponding to 7.4V 4W and a digital-to-analog value (DAC value) corresponding to 8.4V4W may be measured at each frequency point during production, and then a difference value between the two values, i.e., a reference value, may be written in when the intelligent terminal leaves a factory in an optional embodiment.
In a specific implementation scenario, the currently detected battery voltage is X, the preset reference voltage is 7.4V, the reference value is △ Y, and the compensation value is Y, which is (X-7.4) × △ Y.
For example, the preset reference voltage 7.4V, the high-power modulation digital-analog value (DAC value) is Yo, the DAC output voltage is U, and U-Yo-Y is Yo- (X-7.4) △ Y.
And when the current voltage does not exceed the preset reference voltage, controlling the output power of the intelligent terminal according to the preset reference voltage. Specifically, when the current voltage is less than or equal to 7.4V, the DAC203 takes the corresponding digital-to-analog value at the high power of 7.4V as the DAC output voltage.
Step 23: the current consumed by the radio frequency power amplifier is sampled through the sampling resistor, the sampled current is converted into consumed voltage of the radio frequency power amplifier through the current-voltage conversion circuit, error amplification is carried out on the consumed voltage and DAC output voltage in the subtraction circuit, and finally the error voltage is used for controlling the grid bias voltage of the radio frequency power amplifier so as to control power.
In this embodiment, the intercom includes a radio frequency power amplifier (RF PA), which is an important component of various wireless transmitters. In the front stage circuit of the transmitter, the radio frequency signal power generated by the modulation oscillation circuit is very small, and the radio frequency signal can be fed to an antenna to be radiated after sufficient radio frequency power is obtained through a series of amplifying-buffering stage, intermediate amplifying stage and final power amplifying stage. According to the embodiment, the power of the intelligent terminal is controlled by controlling the grid bias voltage of the radio frequency power amplifier.
The current consumed by the rf power amplifier is sampled by the sampling resistor 206, the sampled current is converted into a discharge voltage by the current-voltage conversion circuit 207, and the consumed voltage and the DAC output voltage are subjected to error amplification by the subtractor 204. And finally, controlling the grid bias voltage of the power amplifier by using the error voltage so as to control the output power of the interphone.
According to the above description, different from the prior art, the power control method of the intelligent terminal provided by the application compensates the output power of the intelligent terminal by acquiring the current voltage and the consumed voltage and comparing the current voltage and the consumed voltage with the preset reference voltage, dynamically controls the output power, prolongs the standby time, and improves the user experience.
Referring to fig. 4, fig. 4 is a schematic structural diagram of an embodiment of the intelligent terminal of the present application. The intelligent terminal is an interphone, and can be other wireless communication terminals in other scenes, which is not limited herein. The following description will be made by taking an intercom as an example.
In this embodiment, the intelligent terminal 30 includes a data acquisition circuit 301, a data processing circuit 302, and a power control circuit 303, which are sequentially connected by a circuit. The data acquisition circuit 301 is specifically configured to acquire a current voltage of a battery of the intelligent terminal according to a preset frequency. The battery power of the intelligent terminal 30 is always in a consumption process, and in order to dynamically control the output power of the intelligent terminal 30, the battery power is sampled according to a preset frequency. In a specific implementation scenario, the data acquisition circuit 301 obtains the current voltage of the battery of the intelligent terminal according to a preset frequency. Specifically, the data acquisition circuit 301 acquires the remaining capacity of the battery of the smart terminal 30 at a preset frequency, and converts the remaining capacity into the current voltage by using a processor on the battery.
In the operating state of the intelligent terminal 30, the output power of the intelligent terminal 30 is larger as the current voltage is larger. Here, a preset reference voltage value is provided, and the data processing circuit 302 compensates the output power of the intelligent terminal 30 according to the relationship between the current voltage and the preset reference voltage, that is, the data processing circuit 302 obtains the DAC output voltage according to the current voltage of the battery of the intelligent terminal 30 and the preset reference voltage.
In this embodiment, the data processing circuit 302 includes a programmable logic device CPLD and a digital signal processor DSP, and the data processing circuit 302 transmits the current voltage converted from the battery processor to the complex programmable logic device CPLD through a data line for processing, so as to determine whether the current voltage of the battery exceeds a preset reference voltage. There are two operations according to the judgment result:
(1) the current battery voltage > the preset reference voltage, the DAC output voltage needs to be adjusted.
(2) And keeping the preset reference voltage as the DAC output voltage when the current battery voltage is less than or equal to the preset reference voltage.
The preset reference voltage is a rated battery voltage of the intelligent terminal 30, and the preset reference voltage is 7.4V. In other embodiments, the preset reference voltage may also be 7.6V, which is not limited herein. When the current voltage is greater than the preset reference voltage, the processed current voltage of the battery is output to a Digital Signal Processor (DSP) for processing, and the data line can conform to an onewire (single bus) protocol. The single bus technology adopts a single signal line, namely, the clock and the data are transmitted, and the data transmission is bidirectional, so that the bus has incomparable advantages in the aspects of simple circuit, low hardware overhead, low cost and simple software design.
In another embodiment, the smart terminal 30 is a mobile phone, and the preset reference voltage of the smart terminal 30 is a rated battery voltage of the smart terminal 30. Specifically, the preset reference voltage of the intelligent terminal 30 is 3.7V. In other embodiments, the preset reference voltage of the smart terminal 30 may be determined according to the type of the smart terminal 30 and the type of the battery of the smart terminal 30, which is not limited in this application.
In order to compensate the output power more accurately, the intelligent terminal 30 first acquires the current frequency of the intelligent terminal 30 during the stage of processing the voltage data by the digital signal processor DSP by the data processing circuit 302. Different operating frequencies may also affect the output power of the smart terminal 30 at the same voltage. For example, in the high-frequency operation state, the intelligent terminal 30 has higher output power and consumes more battery.
Then, the data processing circuit 302 obtains a corresponding reference value in a preset lookup table according to the current frequency of the intelligent terminal 30. In one specific implementation scenario, the reference value is the difference between the digital-to-analog value (DAC value) for a 7.4V high power and the digital-to-analog value (DAC value) for an 8.4V high power. For example, if the digital-to-analog value (DAC value) for 7.4V 4W is 1800 and the digital-to-analog value (DAC value) for 8.4V4W is 1700, the reference value is the difference between them, which is 100.
Correspondingly, the preset lookup table is a reference value set corresponding to different frequencies. Specifically, a digital-to-analog value (DAC value) corresponding to 7.4V 4W and a digital-to-analog value (DAC value) corresponding to 8.4V4W may be measured at each frequency point during production, and then a difference value between the two values, i.e., a reference value, may be written in when the intelligent terminal leaves a factory in an optional embodiment.
In a specific implementation scenario, the currently detected battery voltage is X, the preset reference voltage is 7.4V, the reference value is △ Y, and the compensation value is Y, then Y is (X-7.4) × △ Y.
Further, the data processing circuit 302 obtains a DAC output voltage according to the compensation value, where the DAC output voltage is a difference between a digital-analog value (DAC value) corresponding to the preset reference voltage and the compensation value, for example, the preset reference voltage is 7.4V, the high-power modulation digital-analog value (DAC value) is Yo, the DAC output voltage is U, and U-Yo-Y is Yo- (X-7.4) × △ Y.
When the current voltage does not exceed the preset reference voltage, the data processing circuit 302 maintains the preset reference voltage as the DAC output voltage, and the power control circuit 303 controls the output power of the intelligent terminal 30 according to the preset reference voltage and the consumption current of the intelligent terminal 30. Specifically, when the current voltage is less than or equal to 7.4V, the digital-to-analog converter DAC takes the corresponding digital-to-analog value at the high power of 7.4V as the output voltage of the DAC.
In the present embodiment, the smart terminal 30 includes an RF PA (radio frequency power amplifier, which is an important component of various wireless transmitters, in the front stage circuit of the transmitter, the power of the radio frequency signal generated by the modulation oscillation circuit is very small, and the radio frequency signal needs to pass through a series of amplification-buffer stages, intermediate amplification stages, and final power amplification stages to obtain sufficient radio frequency power before being fed to the antenna for radiation.
The data acquisition circuit 301 samples the current consumed by the rf power amplifier through the sampling resistor, converts the sampled current into a discharge voltage through the current-voltage conversion circuit, and amplifies an error between the consumed voltage and an output voltage in the subtractor. And finally, controlling the grid bias voltage of the power amplifier by using the error voltage so as to control the output power of the intelligent terminal.
According to the description, the intelligent terminal is different from the prior art, the output power of the intelligent terminal is compensated by acquiring the current voltage and the consumed voltage and comparing the current voltage and the consumed voltage with the preset reference voltage, the output power is dynamically controlled, the standby time is prolonged, and the user experience is improved.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings, or which are directly or indirectly applied to other related technical fields, are intended to be included within the scope of the present application.

Claims (10)

1. A power control method of an intelligent terminal, the power control method comprising:
acquiring the current voltage of a battery of the intelligent terminal according to a preset frequency;
acquiring DAC output voltage according to the current voltage of the battery of the intelligent terminal and a preset reference voltage;
and compensating the output power of the intelligent terminal according to the DAC output voltage and the consumption voltage of the intelligent terminal.
2. The power control method according to claim 1, wherein the step of obtaining the DAC output voltage according to the current voltage and the preset reference voltage specifically comprises:
judging whether the current voltage of the battery exceeds the preset reference voltage or not;
if the current voltage of the battery exceeds the preset reference voltage, adjusting the output voltage of the DAC; and if the current voltage of the battery does not exceed the preset reference voltage, keeping the preset reference voltage as the DAC output voltage.
3. The power control method according to claim 1, wherein the step of obtaining the current voltage of the battery of the smart terminal at the preset frequency specifically comprises:
acquiring the residual electric quantity of a battery of the intelligent terminal;
and converting the residual capacity into the current voltage of the battery.
4. The power control method according to claim 2, wherein the step of adjusting the DAC output voltage if the current voltage of the battery does not exceed the preset reference voltage specifically comprises:
outputting the current voltage of the battery to a Digital Signal Processor (DSP);
and adjusting the DAC output voltage through the Digital Signal Processor (DSP).
5. The power control method according to claim 2, wherein the step of adjusting the DAC output voltage if the current voltage of the battery does not exceed the preset reference voltage specifically comprises:
acquiring the current frequency of the intelligent terminal;
obtaining a corresponding reference value in a preset lookup table according to the current frequency of the intelligent terminal;
calculating a compensation value of the current voltage of the battery relative to the preset reference voltage, wherein the compensation value is the product of the difference value of the current voltage of the battery and the preset reference voltage and the reference value;
and acquiring DAC output voltage, wherein the DAC output voltage is the difference value between the DAC value corresponding to the preset reference voltage and the compensation value.
6. The power control method according to claim 4, wherein the smart terminal comprises a radio frequency power amplifier, and the step of compensating the output power of the smart terminal according to the DAC output voltage and the consumption voltage of the smart terminal specifically comprises:
acquiring the consumption voltage of the radio frequency power amplifier;
carrying out error amplification on the DAC output voltage and the consumption voltage of the radio frequency power amplifier in a subtraction circuit to obtain an error voltage;
and controlling the grid bias voltage of the radio frequency power amplifier through the error voltage so as to control the power of the intelligent terminal.
7. The power control method according to claim 6, wherein the step of obtaining the consumption voltage of the radio frequency power amplifier specifically comprises:
sampling the current consumed by the radio frequency power amplifier through a sampling resistor according to a preset frequency;
and converting the current consumed by the radio frequency power amplifier into the consumed voltage of the radio frequency power amplifier through a current-voltage conversion circuit.
8. The power control method according to claim 1, wherein the preset reference voltage is a battery rated voltage of the intelligent terminal.
9. The power control method according to any one of claims 1 to 8, wherein the preset reference voltage is any one of 7.4V, 7.6V, or 3.7V.
10. An intelligent terminal is characterized by comprising a data acquisition circuit, a data processing circuit and a power control circuit which are sequentially connected by circuits;
the data acquisition circuit is specifically used for acquiring the current voltage of the battery of the intelligent terminal according to a preset frequency;
the data processing circuit is specifically used for acquiring DAC output voltage according to the current voltage of the battery of the intelligent terminal and a preset reference voltage;
the power control circuit is specifically used for compensating the output power of the intelligent terminal according to the DAC output voltage and the consumption voltage of the intelligent terminal;
the acquisition circuit, the data processing circuit and the power control circuit cooperate with each other to implement the power control method of any one of claims 1 to 9.
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